From: | Craig Ringer <craig(at)2ndquadrant(dot)com> |
---|---|
To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
Cc: | Julien Rouhaud <julien(dot)rouhaud(at)dalibo(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Marc Cousin <marc(dot)cousin(at)dalibo(dot)com> |
Subject: | Re: Issue with bgworker, SPI and pgstat_report_stat |
Date: | 2016-07-11 04:53:02 |
Message-ID: | CAMsr+YEhMNaVqPQdyhkWXdJ9ey+htgK7DwtBfzBM6Md04LiAHw@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On 11 July 2016 at 11:49, Michael Paquier <michael(dot)paquier(at)gmail(dot)com> wrote:
> On Mon, Jul 11, 2016 at 3:36 AM, Julien Rouhaud
> <julien(dot)rouhaud(at)dalibo(dot)com> wrote:
> > I'm not opposed, but in this case we should also provide a proper
> > documentation of all the required actions to mimick normal backends.
>
> I'd rather just add a note like "Have a look at PostgresMain if you
> want to imitate a backend able to run queries!" instead of listing all
> the actions doable. If low-level things are added or removed in the
> future in PostgresMain, it is very likely that the documentation will
> not be updated at the same time, killing its purpose at the end.
That sounds like a bug breeding ground. Especially with extensions whose
bgworkers operate across Pg versions, extensions that get updated without
re-checking PostgresMain and don't notice some new housekeeping task, etc.
Rather than encouraging every extension author to copy and paste random
chunks of PostgresMain, probably incorrectly, I really think factoring the
required logic out into something reusable by bgworkers is going to be the
way to go.
--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
From | Date | Subject | |
---|---|---|---|
Next Message | Craig Ringer | 2016-07-11 05:03:27 | Re: [HACKERS] Logical decoding |
Previous Message | Michael Paquier | 2016-07-11 04:51:03 | Re: pgbench - minor doc improvements |